Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b20db3c8475c07…

MALICIOUS

PDF

76.8 KB Created: 2021-07-17 23:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 970b8cad2314bb27d1caa4cb7b677e58 SHA-1: c16f7853d9e4ac95de8a726b03111b87a4d0a3f4 SHA-256: 84b20db3c8475c07aba7c016a45b0c04a38480fc1c04abea30a11b1a056e4b7f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is associated with a phishing heuristic. Although no scripts were extracted, the presence of embedded URLs and the detection results suggest the document is designed to trick users into navigating to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/y83TWYo-3DA/square?utm_term=pulled+pork+thermomix
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e926692210ba6bce125414/1625892457301/things_to_do_during_foreplaying.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8d4de5ef51a130ea0dae5/1625871582770/37533195061.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2f1849ee5897bff9d4818/1626534276728/how_to_do_a_backflip_on_the_trampoline_for_beginners.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb7a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7A 16792 bytes
font_01_sfnt_off0000e391.bin
f2e5f33e1dafa9d32718dcc34fd7b30dec202c8d21e83e04cd7e3751699816f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 10520 bytes
font_02_sfnt_off0000fb7d.bin
904a9739c468a6dbb4e94f5bf3ef83620bda43d5349c2c090d3132816df9ec36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 17016 bytes

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